nfsd4: rearrange cb data structures

Mainly I just want to separate the arguments used for setting up the tcp
client from the rest.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>

diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index 5856fc8..d6c46a9 100644 (file)
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -455,7 +455,7 @@ static int max_cb_time(void)
 }
 
 /* Reference counting, callback cleanup, etc., all look racy as heck.
- * And why is cb_set an atomic? */
+ * And why is cl_cb_set an atomic? */
 
 int setup_callback_client(struct nfs4_client *clp)
 {
@@ -481,7 +481,7 @@ int setup_callback_client(struct nfs4_client *clp)
        if (!clp->cl_principal && (clp->cl_flavor >= RPC_AUTH_GSS_KRB5))
                return -EINVAL;
        if (cb->cb_minorversion) {
-               args.bc_xprt = clp->cl_cb_xprt;
+               args.bc_xprt = clp->cl_cb_conn.cb_xprt;
                args.protocol = XPRT_TRANSPORT_BC_TCP;
        }
        /* Create RPC client */
@@ -491,7 +491,7 @@ int setup_callback_client(struct nfs4_client *clp)
                        PTR_ERR(client));
                return PTR_ERR(client);
        }
-       cb->cb_client = client;
+       clp->cl_cb_client = client;
        return 0;
 
 }
@@ -509,7 +509,7 @@ static void nfsd4_cb_probe_done(struct rpc_task *task, void *calldata)
        if (task->tk_status)
                warn_no_callback_path(clp, task->tk_status);
        else
-               atomic_set(&clp->cl_cb_conn.cb_set, 1);
+               atomic_set(&clp->cl_cb_set, 1);
 }
 
 static const struct rpc_call_ops nfsd4_cb_probe_ops = {
@@ -531,7 +531,6 @@ int set_callback_cred(void)
 
 void do_probe_callback(struct nfs4_client *clp)
 {
-       struct nfs4_cb_conn *cb = &clp->cl_cb_conn;
        struct rpc_message msg = {
                .rpc_proc       = &nfs4_cb_procedures[NFSPROC4_CLNT_CB_NULL],
                .rpc_argp       = clp,
@@ -539,7 +538,7 @@ void do_probe_callback(struct nfs4_client *clp)
        };
        int status;
 
-       status = rpc_call_async(cb->cb_client, &msg,
+       status = rpc_call_async(clp->cl_cb_client, &msg,
                                RPC_TASK_SOFT | RPC_TASK_SOFTCONN,
                                &nfsd4_cb_probe_ops, (void *)clp);
        if (status)
@@ -554,7 +553,7 @@ nfsd4_probe_callback(struct nfs4_client *clp)
 {
        int status;
 
-       BUG_ON(atomic_read(&clp->cl_cb_conn.cb_set));
+       BUG_ON(atomic_read(&clp->cl_cb_set));
 
        status = setup_callback_client(clp);
        if (status) {
@@ -656,7 +655,7 @@ static void nfsd4_cb_recall_done(struct rpc_task *task, void *calldata)
        switch (task->tk_status) {
        case -EIO:
                /* Network partition? */
-               atomic_set(&clp->cl_cb_conn.cb_set, 0);
+               atomic_set(&clp->cl_cb_set, 0);
                warn_no_callback_path(clp, task->tk_status);
        case -EBADHANDLE:
        case -NFS4ERR_BAD_STATEID:
@@ -673,7 +672,7 @@ static void nfsd4_cb_recall_done(struct rpc_task *task, void *calldata)
                rpc_restart_call(task);
                return;
        } else {
-               atomic_set(&clp->cl_cb_conn.cb_set, 0);
+               atomic_set(&clp->cl_cb_set, 0);
                warn_no_callback_path(clp, task->tk_status);
        }
 }
@@ -709,11 +708,11 @@ void nfsd4_destroy_callback_queue(void)
 void nfsd4_set_callback_client(struct nfs4_client *clp, struct rpc_clnt
 *new)
 {
-       struct rpc_clnt *old = clp->cl_cb_conn.cb_client;
+       struct rpc_clnt *old = clp->cl_cb_client;
 
-       clp->cl_cb_conn.cb_client = new;
+       clp->cl_cb_client = new;
        /*
-        * After this, any work that saw the old value of cb_client will
+        * After this, any work that saw the old value of cl_cb_client will
         * be gone:
         */
        flush_workqueue(callback_wq);
@@ -728,7 +727,7 @@ void nfsd4_set_callback_client(struct nfs4_client *clp, struct rpc_clnt
 static void _nfsd4_cb_recall(struct nfs4_delegation *dp)
 {
        struct nfs4_client *clp = dp->dl_client;
-       struct rpc_clnt *clnt = clp->cl_cb_conn.cb_client;
+       struct rpc_clnt *clnt = clp->cl_cb_client;
        struct nfs4_rpc_args *args = &dp->dl_recall.cb_args;
        struct rpc_message msg = {
                .rpc_proc = &nfs4_cb_procedures[NFSPROC4_CLNT_CB_RECALL],

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index cf650cb..59c9bd4 100644 (file)
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -726,8 +726,8 @@ expire_client(struct nfs4_client *clp)
                release_session(ses);
        }
        nfsd4_set_callback_client(clp, NULL);
-       if (clp->cl_cb_xprt)
-               svc_xprt_put(clp->cl_cb_xprt);
+       if (clp->cl_cb_conn.cb_xprt)
+               svc_xprt_put(clp->cl_cb_conn.cb_xprt);
        free_client(clp);
 }
 
@@ -814,7 +814,7 @@ static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir,
        }
 
        memcpy(clp->cl_recdir, recdir, HEXDIR_LEN);
-       atomic_set(&clp->cl_cb_conn.cb_set, 0);
+       atomic_set(&clp->cl_cb_set, 0);
        INIT_LIST_HEAD(&clp->cl_idhash);
        INIT_LIST_HEAD(&clp->cl_strhash);
        INIT_LIST_HEAD(&clp->cl_openowners);
@@ -1302,8 +1302,8 @@ nfsd4_create_session(struct svc_rqst *rqstp,
                move_to_confirmed(unconf);
 
                if (cr_ses->flags & SESSION4_BACK_CHAN) {
-                       unconf->cl_cb_xprt = rqstp->rq_xprt;
-                       svc_xprt_get(unconf->cl_cb_xprt);
+                       unconf->cl_cb_conn.cb_xprt = rqstp->rq_xprt;
+                       svc_xprt_get(rqstp->rq_xprt);
                        rpc_copy_addr(
                                (struct sockaddr *)&unconf->cl_cb_conn.cb_addr,
                                sa);
@@ -1607,7 +1607,7 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
                else {
                        /* XXX: We just turn off callbacks until we can handle
                          * change request correctly. */
-                       atomic_set(&conf->cl_cb_conn.cb_set, 0);
+                       atomic_set(&conf->cl_cb_set, 0);
                        expire_client(unconf);
                        status = nfs_ok;
 
@@ -2320,7 +2320,7 @@ nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_sta
 {
        struct nfs4_delegation *dp;
        struct nfs4_stateowner *sop = stp->st_stateowner;
-       struct nfs4_cb_conn *cb = &sop->so_client->cl_cb_conn;
+       int cb_up = atomic_read(&sop->so_client->cl_cb_set);
        struct file_lock fl, *flp = &fl;
        int status, flag = 0;
 
@@ -2328,7 +2328,7 @@ nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_sta
        open->op_recall = 0;
        switch (open->op_claim_type) {
                case NFS4_OPEN_CLAIM_PREVIOUS:
-                       if (!atomic_read(&cb->cb_set))
+                       if (!cb_up)
                                open->op_recall = 1;
                        flag = open->op_delegate_type;
                        if (flag == NFS4_OPEN_DELEGATE_NONE)
@@ -2339,7 +2339,7 @@ nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_sta
                         * had the chance to reclaim theirs.... */
                        if (locks_in_grace())
                                goto out;
-                       if (!atomic_read(&cb->cb_set) || !sop->so_confirmed)
+                       if (!cb_up || !sop->so_confirmed)
                                goto out;
                        if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
                                flag = NFS4_OPEN_DELEGATE_WRITE;
@@ -2510,7 +2510,7 @@ nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
        renew_client(clp);
        status = nfserr_cb_path_down;
        if (!list_empty(&clp->cl_delegations)
-                       && !atomic_read(&clp->cl_cb_conn.cb_set))
+                       && !atomic_read(&clp->cl_cb_set))
                goto out;
        status = nfs_ok;
 out:

diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h
index cef20ab..cf43812 100644 (file)
--- a/fs/nfsd/state.h
+++ b/fs/nfsd/state.h
@@ -107,9 +107,7 @@ struct nfs4_cb_conn {
        u32                     cb_prog;
        u32                     cb_minorversion;
        u32                     cb_ident;       /* minorversion 0 only */
-       /* RPC client info */
-       atomic_t                cb_set;     /* successful CB_NULL call */
-       struct rpc_clnt *       cb_client;
+       struct svc_xprt         *cb_xprt;       /* minorversion 1 only */
 };
 
 /* Maximum number of slots per session. 160 is useful for long haul TCP */
@@ -223,9 +221,13 @@ struct nfs4_client {
        struct svc_cred         cl_cred;        /* setclientid principal */
        clientid_t              cl_clientid;    /* generated by server */
        nfs4_verifier           cl_confirm;     /* generated by server */
-       struct nfs4_cb_conn     cl_cb_conn;     /* callback info */
        u32                     cl_firststate;  /* recovery dir creation */
 
+       /* for v4.0 and v4.1 callbacks: */
+       struct nfs4_cb_conn     cl_cb_conn;
+       struct rpc_clnt         *cl_cb_client;
+       atomic_t                cl_cb_set;
+
        /* for nfs41 */
        struct list_head        cl_sessions;
        struct nfsd4_clid_slot  cl_cs_slot;     /* create_session slot */
@@ -236,7 +238,6 @@ struct nfs4_client {
        /* We currently support a single back channel with a single slot */
        unsigned long           cl_cb_slot_busy;
        u32                     cl_cb_seq_nr;
-       struct svc_xprt         *cl_cb_xprt;    /* 4.1 callback transport */
        struct rpc_wait_queue   cl_cb_waitq;    /* backchannel callers may */
                                                /* wait here for slots */
 };